Chain tensioning mechanism

Abstract

The utility model discloses a chain tensioning mechanism which comprises a base, a first pin, a connecting rod, a chain wheel, a second pin, a tension spring and a third pin, the first pin is installed on the base, the connecting rod is arranged on the first pin in a rotating mode, the chain wheel and the second pin are arranged on the connecting rod, the second pin is externally connected with the tension spring, and the third pin is installed on the base. A third pin is installed on the outer side of the connecting rod of the base and connected with the tension spring. By means of the mode, according to the chain tensioning mechanism, swing of the connecting rod is achieved through the first pin, self-adaptive adjustment of the tensioning force of an idle wheel chain wheel on the connecting rod is achieved through the tension spring, meanwhile, deflection of the installation position is achieved through the kidney-shaped hole so as to finely adjust the tension force of the spring, and therefore a traditional chain tensioner based on a lead screw tensioning base is replaced. The purposes of self-adaption and maintenance-free tensioning adjustment are achieved, and the running stability of the chain is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of tensioner especially relates to a chain tensioning mechanism. BACKGROUND

[0002] The idler sprocket tensioner mainly consists of screw positioning adjusting seat, sprocket idler, connecting shaft, adjusting screw and the like. Its principle is to rotate the screw through the adjusting screw, so that the sprocket idler translates along the screw, and the sprocket idler thus realizes the tensioning of the chain. It can ensure that the chain has proper tensioning force in the transmission process, prevents the chain from loosening and falling off, and reduces the wear of the sprocket and the chain. Since the mounting holes of the whole mechanism are fixed, it is necessary to adjust the tensioning force by manual operation, and for some large-scale conveying equipment, manual adjustment of a large number of tensioners requires a large amount of labor and a lot of time for maintenance, which is difficult to meet the production needs. SUMMARY

[0003] The utility model mainly solves the technical problem to provide a chain tensioning mechanism, swing is realized to connecting rod through first pin, and the self -adaptation adjustment of sprocket idler tensioning force on connecting rod is realized through tension spring, and the installation position is deflected to fine tune spring tension with the help of waist hole, so as to replace the traditional chain tensioner based on screw tensioning seat, realize the self -adaptation of tensioning adjustment, maintenance -free purpose, improve chain operation stability.

[0004] To solve the above technical problems, one technical scheme of the utility model is provided: a chain tensioning mechanism is provided, which comprises a base, a first pin, a connecting rod, a sprocket, a second pin, a tension spring and a third pin, the base is provided with the first pin, the first pin is provided with the connecting rod, the connecting rod is provided with the sprocket and the second pin, the second pin is connected with the tension spring, the base is provided with the third pin outside the connecting rod, and the third pin is connected with the tension spring.

[0005] In a preferred embodiment of the utility model, a pair of parallel waist holes are formed in the base, and the waist holes are arranged on both sides of the third pin.

[0006] In a preferred embodiment of the utility model, the connecting rod has a distal end away from the first pin, an axle hole is formed in the distal end and vertically connected with a bolt, the bolt is coaxially connected with the sprocket, a clamping groove is formed in the bolt at a position aligned with the end face of the sprocket, and a clamping spring is installed in the clamping groove and clamped on the end face of the sprocket.

[0007] In a preferred embodiment of the utility model, a sleeve is connected between the axle hole and the sprocket of the bolt, and the sleeve is abutted with the connecting rod and the sprocket at both ends.

[0008] In a preferred embodiment of the utility model, the middle section of the connecting rod is provided with an avoiding slot in the lateral direction, the slot opening of the avoiding slot faces the third pin, the second pin is arranged in the avoiding slot, and the end of the tension spring extends into the avoiding slot and is connected with the second pin.

[0009] In a preferred embodiment of the utility model, a step groove is formed on the base and a limiting baffle wall is formed, and the side surface of the connecting rod is in parallel abutment on the limiting baffle wall.

[0010] In a preferred embodiment of the utility model, the first pin, the second pin and the third pin are arranged in the shape of an acute triangle.

[0011] In a preferred embodiment of the utility model, the second pin is located between the sprocket and the first pin.

[0012] The utility model discloses a chain tensioning mechanism, which realizes the swing of the connecting rod through the first pin, realizes the self-adaptive adjustment of the tensioning force of the idler sprocket on the connecting rod through the tension spring, and realizes the installation position deflection through the waist hole to fine-tune the spring tension, so as to replace the traditional chain tensioner based on the screw tensioning seat, realize the self-adaptive tensioning adjustment and maintenance-free purpose, and improve the chain operation stability. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor, wherein:

[0014] Fig. 1 It is the overall structure diagram of a preferred embodiment of the utility model chain tensioning mechanism;

[0015] Fig. 2 It is the local enlarged structure diagram of a preferred embodiment of the utility model chain tensioning mechanism. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiments of the utility model will be clearly and completely described as follows. Obviously, the described embodiments are only some embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0017] As shown in Figs. 1-2 The embodiments of the utility model include:

[0018] A chain tensioning mechanism, comprising a base 1, a first pin 2, a connecting rod 3, a sprocket 4, a second pin 5, a tension spring 6, a third pin 7, the first pin 2 is installed on the base 1, the connecting rod 3 is rotatably arranged on the first pin 2, the sprocket 4 and the second pin 5 are arranged on the connecting rod 3, the second pin 5 is circumscribed by a tension spring 6, the third pin 7 is installed on the outside of the connecting rod 3, and the third pin 7 is connected with the tension spring 6.

[0019] Wherein, a pair of parallel waist holes 8 are arranged on the base 1, and the waist holes 8 are arranged on both sides of the third pin 7.

[0020] Further, the connecting rod 3 has a distal end away from the first pin 2, the distal end is provided with an axle hole 9 and vertically penetrates a bolt 10, the bolt 10 is coaxially penetrated by the sprocket 4, the bolt 10 is provided with a clamping groove 11 at the position aligned with the end face of the sprocket 4, and the clamping groove 11 is provided with a clamping spring matched with the end face of the sprocket 4.

[0021] Further, the bolt 10 is penetrated by a sleeve 12 between the axle hole 9 and the sprocket 4, and the sleeve 12 is respectively abutted with the connecting rod 3 and the sprocket 4 at both ends.

[0022] Further, the connecting rod 3 is laterally provided with an avoiding slot 13 at the middle segment, the avoiding slot 13 is provided with a slot opening facing the third pin 7, the second pin 5 is arranged in the avoiding slot 13, and the end of the tension spring 6 extends into the avoiding slot 13 and is connected with the second pin 5.

[0023] Further, the base 1 is provided with a stepped groove and forms a limiting baffle 14, and the side surface of the connecting rod 3 is parallelly abutted on the limiting baffle 14.

[0024] Further, the first pin 2, the second pin 5 and the third pin 7 are arranged in the shape of an acute triangle.

[0025] Further, the second pin 5 is located between the sprocket 4 and the first pin 2.

[0026] The connecting rod 3 of the product is connected with the base 1 through the tension spring 6, the tension of the chain is provided by the tension spring 6 in the tension state, so that the self-adaptive adjustment of the tension degree is realized. At this time, the chain is in a V-shaped shape and is pulled tight by the idler sprocket 4, in this state, the chain and the tension spring 6 are on both sides of the connecting rod 3, and a pair of opposite reaction forces are provided between the two to realize the steady state. In addition, the mounting hole of the traditional tensioner usually adopts a fixed mounting position, after the tensioner is installed, the lead screw needs to be adjusted again to install the chain, and after the chain is installed, the lead screw needs to be adjusted again for re-calibration. The waist hole 8 design of the product can not only be freely installed without complex adjustment process, but also can freely adjust the installation position of the product, that is, the waist hole 8 only needs to limit the single direction of one hole, and the other empty direction can be finely adjusted. In this way, the tension can be adjusted to a certain extent, and the initial tension of the tension spring 6 on the chain is changed, so that the cooperative cooperation between the tension systems composed of a plurality of the products can be realized.

[0027] The product has simple structure and convenient installation, and only needs to connect and fix the base 1, the connecting rod 3, the chain wheel 4 and the tension spring 6 through the pin and the bolt 10. The use method is: locking the base 1 on the equipment at a suitable position, rotating the connecting rod 3, and placing the chain wheel 4 on the chain of the equipment with a certain tension to play a tensioning role.

[0028] In summary, the chain tensioning mechanism provided by the utility model realizes the swing of the connecting rod 3 through the first pin 2, realizes the self-adaptive adjustment of the tension of the idler sprocket 4 on the connecting rod 3 through the tension spring 6, and realizes the deflection of the installation position through the waist hole 8 to finely adjust the spring tension, so as to replace the traditional chain tensioner based on the lead screw tension seat, realize the self-adaptive tension adjustment, realize the maintenance-free purpose, and improve the running stability of the chain.

[0029] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion according to the content of the utility model specification, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A chain tensioning mechanism, characterized by, The utility model provides a kind of linkage mechanism, including base, first pin, connecting rod, sprocket, second pin, tension spring, third pin, first pin is installed on the base, rotatingly arranged connecting rod is provided on the first pin, sprocket and second pin are provided on the connecting rod, the second pin is circumscribed a tension spring, third pin is installed on the outside of connecting rod of the base, and third pin is connected with tension spring.

2. The chain tensioner mechanism of claim 1, wherein A pair of parallel waist holes are formed in the base, and the waist holes are arranged on both sides of the third pin.

3. The chain tensioner mechanism of claim 1, wherein The connecting rod has a distal end away from the first pin, the distal end is provided with an axle hole and vertically penetrates a bolt, the bolt is coaxially penetrated with a sprocket, the bolt is provided with a clamping groove at a position aligned with the end face of the sprocket, and a clamping spring is installed in the clamping groove and matched with the end face of the sprocket.

4. The chain tensioner mechanism of claim 3, wherein, The bolt is penetrated with a sleeve between the axle hole and the sprocket, and the two ends of the sleeve are respectively abutted with the connecting rod and the sprocket.

5. The chain tensioner mechanism of claim 1, wherein, A lateral position-avoiding groove is formed in the middle section of the connecting rod, the groove opening of the position-avoiding groove faces the third pin, the second pin is arranged in the position-avoiding groove, and the end of the tension spring extends into the position-avoiding groove and is connected with the second pin.

6. The chain tensioner mechanism of claim 1, wherein, A step groove is formed in the base and forms a limiting baffle, and the side surface of the connecting rod is parallelly abutted on the limiting baffle.

7. The chain tensioner mechanism of claim 1, wherein The first pin, the second pin and the third pin are arranged in the shape of an acute triangle.

8. The chain tensioner mechanism of claim 1, wherein, The second pin is located between the sprocket and the first pin.

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